Hui Chun Sheng

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Shanghai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Drilling rig masts and methods of assembly and erection
- Patent number 9,441,423
- Issue date Sep 13, 2016
- National-Oilwell Varco, L.P.
- Robert Benjamin Donnally
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Drilling rig masts and methods of assembly and erecting masts
- Patent number 8,549,815
- Issue date Oct 8, 2013
- National Oilwell Varco LP
- Robert Benjamin Donnally
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drilling rigs and erection methods
- Patent number 8,468,753
- Issue date Jun 25, 2013
- National Oilwell Varco LP
- Robert Benjamin Donnally
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drilling rig structure installation and methods
- Patent number 8,250,816
- Issue date Aug 28, 2012
- National Oilwell Varco LP
- Robert Benjamin Donnally
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drilling rig drawworks installation
- Patent number 8,047,303
- Issue date Nov 1, 2011
- National Oilwell Varco LP
- Robert Benjamin Donnally
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DRILLING RIG MASTS AND METHODS OF ASSEMBLY AND ERECTION
- Publication number 20150059262
- Publication date Mar 5, 2015
- National Oilwell Varco, L.P.
- Robert Benjamin Donnally
- E21 - EARTH DRILLING MINING
Information Patent Application
Grating fastening methods and systems
- Publication number 20090293417
- Publication date Dec 3, 2009
- Chunqiao Ren
- E04 - BUILDING
Information Patent Application
Drilling rigs and erection methods
- Publication number 20090218139
- Publication date Sep 3, 2009
- Robert Benjamin Donnally
- E21 - EARTH DRILLING MINING
Information Patent Application
Drilling rig masts and methods of assembly and erecting masts
- Publication number 20090218144
- Publication date Sep 3, 2009
- Robert Benjamin Donnally
- E21 - EARTH DRILLING MINING
Information Patent Application
Drilling rig structure installation and methods
- Publication number 20090218138
- Publication date Sep 3, 2009
- Robert Benjamin Donnally
- E21 - EARTH DRILLING MINING
Information Patent Application
Drilling rig drawworks installation
- Publication number 20090218137
- Publication date Sep 3, 2009
- Robert Benjamin Donnally
- E21 - EARTH DRILLING MINING